On your dashboard you will notice a filter for 'unsegmented traffic' this filter will show any visits that were not captured by your dashboard's current filters.
If you click on the blue text, 'tagged' or 'referral' you will be redirected to the channel builder.
Here you will see all the parameters, domains, and paths for your unsegmented visits.
You can automatically add any of these parameters as new filter on your dashboard by clicking 'create filter' to the right side of your screen.
Boom! You'll see this filter on your dashboard. Click the orange refresh button to the top right corner of your screen to rebuild your model with the new filter.
There you have it, short and sweet. If you have any questions please reach out to firstname.lastname@example.org